Investigation of photoluminescence and amplified spontaneous emission properties of cyanoacetic acid derivative (KTB) in PVK amorphous thin films

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dc.contributor.authorPervenecka, Julija
dc.contributor.authorVembris, Aivars
dc.contributor.authorZarins, Elmars
dc.contributor.authorKokars, Valdis
dc.date.accessioned2020-08-19T17:50:41Z
dc.date.available2020-08-19T17:50:41Z
dc.date.issued2018
dc.descriptionThis work was supported by European Regional Development Fund within the Project No. 1.1.1.1/16/A/046 and A.Riekstins SIA “Mikrotīkls” donation, administered by University of Latvia Foundation.en_US
dc.description.abstractIn this work photoluminescence and amplified spontaneous emission properties of new original 2-cyanoacetic acid derivative in different concentration mixed in polyvinyl carbazole (PVK) matrix were investigated. Ethyl 2-(2-(4-(bis(2- (trityloxy)ethyl)amino)styryl)-6-tert-butyl-4H-pyran-4-ylidene)-2-cyanoacetate (KTB) is recently synthesised nonsymmetric red light emitting laser dye, that in previous experiments with neat thin films showed low amplified spontaneous emission (ASE) threshold value. Based on PVK high refractive index it has been used as a polymer to ensure the preparation of good planar waveguide. Luminescence quenching is expected in neat amorphous thin films according to previous experiments which reduces photoluminescence quantum yield and increases ASE excitation threshold energy. It could be overcome by a decrease of the intermolecular interactions between laser active molecules by doping them in polymer matrix thereby decreasing photoluminescence quenching effect in the system by increasing distance between organic molecules which in turn results in lowering ASE excitation threshold energy. The lowest threshold value of ASE was achieved at 20wt% of KTB molecule in PVK matrix. Ability to significantly decrease intermolecular interactions and excitation threshold energy of investigated compound in host-guest systems makes it promising to be used as a laser dye in preparation of organic solid state lasers.en_US
dc.description.sponsorshipERDF 1.1.1.1/16/A/046; SIA "MikroTik" through University of Latvia Foundation; Institute of Solid State Physics, University of Latvia as the Center of Excellence has received funding from the European Union’s Horizon 2020 Framework Programme H2020-WIDESPREAD-01-2016-2017-TeamingPhase2 under grant agreement No. 739508, project CAMART²en_US
dc.identifier.doi10.1117/12.2306835
dc.identifier.urihttps://dspace.lu.lv/dspace/handle/7/52439
dc.language.isoengen_US
dc.publisherSPIEen_US
dc.relationinfo:eu-repo/grantAgreement/EC/H2020/739508/EU/Centre of Advanced Material Research and Technology Transfer/CAMART²en_US
dc.relation.ispartofseriesOrganic Electronics and Photonics: Fundamentals and Devices;10687
dc.rightsinfo:eu-repo/semantics/openAccessen_US
dc.subjectResearch Subject Categories::NATURAL SCIENCES:Physicsen_US
dc.subjectcyanoacetic acid derivativeen_US
dc.subjectglass forming low molecular weight compoundsen_US
dc.subjectamplified spontaneous emissionen_US
dc.subjectlaser dyesen_US
dc.subjectguest-host systemen_US
dc.titleInvestigation of photoluminescence and amplified spontaneous emission properties of cyanoacetic acid derivative (KTB) in PVK amorphous thin filmsen_US
dc.typeinfo:eu-repo/semantics/articleen_US
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